| 一种改进抑制STC-OFDM系统同频干扰的方法* |
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| 引用本文： | 蒋红君,张祖凡,毕姣,丁市召a.一种改进抑制STC-OFDM系统同频干扰的方法*[J].计算机应用研究,2011,28(9):3426-3427. |
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| 作者姓名： | 蒋红君 张祖凡 毕姣 丁市召a |
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| 作者单位： | 1. 重庆邮电大学 通信与信息工程学院,重庆,400065
2. 重庆邮电大学 通信与信息工程学院,重庆 400065;重庆邮电大学 移动通信技术重庆市重点实验室,重庆 400065 |
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| 基金项目： | 国家科技支撑计划资助项目（2008BAH30B10）；国家科技重大专项项目资助（2009ZX03003-006-01）；重庆市科技攻关计划资助项目（CSTC,2010AC2143）；国家教育部“春晖计划”合作科研项目（Z2009-1-63017） |
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| 摘 要： | 空时编码（STC）与正交频分复用多址(OFDM)结合形成的STC-OFDM系统，虽然有效弥补了正交频分复用多址系统中符号间干扰(ISI)和频率选择性衰落等不足，但依然存在如何有效抑制因多天线传输在接收端产生的相互干扰如同频干扰（CCI）等问题。为此，在充分利用STC-OFDM已有优点基础上，给出了一种结合自适应波束赋形和哈达玛转换（WHT）来抑制CCI的算法。通过理论分析与计算机仿真表明，该算法能进一步改善系统误符号率（SER）而抑制STC-OFDM中的同频干扰。
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| 关 键 词： | 正交频分复用 空时编码 自适应波束赋形 哈达玛转换 |
Improved algorithm of co-channel interference suppression for STC-OFDM systems |
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| JIANG Hong-jun,ZHANG Zu-fan,BI Jiao,DING Shi-zhaoa.Improved algorithm of co-channel interference suppression for STC-OFDM systems[J].Application Research of Computers,2011,28(9):3426-3427. |
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| Authors: | JIANG Hong-jun ZHANG Zu-fan BI Jiao DING Shi-zhaoa |
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| Affiliation: | (a.School of Communications & Information Engineering, b.Chongqing Key Laboratory of Mobile Communication, Chongqing University of Posts & Telecommunications, Chongqing 400065, China) |
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| Abstract: | STC-OFDM communication systems combined with space-time coding(STC) and orthogonal frequency-division multipling(OFDM), effectively overcomes the deficiency of inter-symbol interference and frequency selective fading for OFDM communication systems, but it also expect that there be some further solutions suppressing mutual interference including co-channel interference(CCI) due to multi-antenna transmitting at the receiver. Therefore, this paper investigated an algorithm combined with adaptive beamforming (ABF) and Walsh Hadamard transform (WHT) based on previous advantages of STC-OFDM to suppress CCI for OFDM communication systems. Theoretical analysis and computer simulation shows the proposal algorithm can improve performance of symbol error rate (SER) and suppress CCI for STC-OFDM communication systems. |
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| Keywords: | OFDM STC adaptive beamforming Walsh Hadamard transform(WHT) |
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